EUP3291 Datasheet | Eutech Microelectronics

1.5A, 2.25MHz Synchronous Step-Down DC/DC Regulator DESCRIPTION The EUP3291 is synchronous step-down DC-DC converters optimized for battery powered portable applications. The 2.7V to 5.5V input voltage range makes EUP3291 ideal for powering portable equipment that runs from 1-cell Li-Ion or 3-cell Ni MH/Ni CD batteries. The device is also suitable to operate from a standard 3.3V or 5V voltage rail. The EUP3291 operates at 2.25MHz fixed switching frequency allowing the use of small inductors and capacitors to achieve a small solution size. The internal synchronous switch increases efficiency and eliminates the need for an external schottky diode. The EUP3291 has internal soft start and avoids inrush current during startup. The EUP3291 has a user selectable mode of forced PWM and PFM/PWM mode. The forced PWM mode operation provides the lowest ripple noise and the PFM mode operation provides high efficiency at light loads. The EUP3291 is available in TDFN-6 package and it provides up to 1.5A output current. Features High Efficiency Up to 95% 2.25MHz Constant Switching Frequency 1.5A Available Load Current 30µA Typical Quiescent Current 2.7V to 5.5V Input Voltage Range Adjustable Output Voltage as Low as 0.6V No Schottky Diode Required Short Circuit and Thermal Protection Internal Soft Start Function Available in TDFN-6 Package Ro HS pliant and 100% Lead(Pb)-Free Halogen-Free APPLICATIONS SSD Module Smart Phones Tablet PC Portable Media Players µC/µP, FPGA and DSP Power Plug-in DC/DC Modules for Routers and Switchers Typical Application Circuit Figure 1. DS3291 Ver1.0 Mar....